BAT46WH - 100V 250mA Schottky Diode SOD-123F | Nexperia
MPN: BAT46WH ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.12 | $0.12 |
| 10 | $0.09 | $0.90 |
| 100 | $0.055 | $5.50 |
| 500 | $0.038 | $19.00 |
| 1,000 | $0.029 | $29.00 |
Drop-in alternatives for BAT46WH — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
BAT46WJ
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.024 / Unit
View Datasheet →BAT46W
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.029 / Unit
View Datasheet →BAT46W-E3/W
✅ Drop-In📋 Reference alternative (not in catalog)
BAT46WH Maximum Ratings & Electrical Characteristics
| Diode Configuration | Single |
| Technology | Planar Schottky barrier with integrated guard ring |
| Repetitive Peak Reverse Voltage (VRRM) | 100 V |
| Forward Current (IF) | 250 mA |
| Forward Voltage (VF) | 850 mV |
| Non-Repetitive Peak Forward Current | 2.5 A |
| Maximum Operating Temperature | 155 C |
| Package | SOD-123F (flat lead) SMD |
| Mounting Type | Surface Mount |
| Terminal Position | Dual |
| Terminal Form | Flat |
| Number of Terminals | 2 |
| Package Shape | Rectangular |
| Typical Applications | High-speed switching, voltage clamping, line termination, reverse polarity protection |
| RoHS Status | Compliant |
BAT46WH Pin Configuration
| Pin 1 | K (Cathode) — Cathode terminal, marked by the band on the SOD-123F body |
| Pin 2 | A (Anode) — Anode terminal |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
BAT46WH is suitable for 6 applications: Reverse Polarity Protection, High-Speed Switching Circuits, Voltage Clamping and Clipper Networks, DC-DC Converter Output Rectification, Line Termination and Signal Protection, Industrial and Consumer General-Purpose Rectification.
Reverse Polarity Protection
The BAT46WH is explicitly designated by Nexperia for reverse polarity protection, making it a natural fit for battery-powered and field-wired equipment. Its 100 V repetitive reverse voltage gives wide headroom over 12 V, 24 V, and even 48 V DC buses, so inductive kick or supply transients rarely threaten the device. In a series-protection configuration the 850 mV maximum forward voltage keeps conduction loss modest at currents up to 250 mA; a shunt configuration across the input trades constant leakage for zero series drop. Compared with a standard silicon diode, the Schottky junction eliminates reverse-recovery charge, so it clamps immediately when polarity reverses.
Recommended
High-Speed Switching Circuits
Because a Schottky barrier junction stores virtually no minority-carrier charge, the BAT46WH switches between forward and reverse bias with negligible reverse recovery time, which Nexperia lists among its primary use cases. This suits it for switching applications such as detector stages, gating, and waveform-shaping networks where a P-N diode's recovery would corrupt fast edges. The planar construction keeps junction capacitance low, and the 100 V rating means designers can use the same part in both low- and moderately high-voltage signal paths, simplifying the bill of materials. Verify junction capacitance limits from the datasheet curves when operating at very high frequencies.
Recommended
Voltage Clamping and Clipper Networks
The BAT46WH's low 850 mV forward voltage and fast switching make it effective as a clamp or clipper that limits signal excursions without introducing significant delay or distortion at moderate frequencies. The integrated guard ring stabilizes the reverse characteristic near breakdown, so clamping behavior remains predictable over temperature and lot-to-lot. With a 100 V VRRM rating, the diode survives large clamped voltage swings that would destroy 30-40 V small-signal Schottkys. Designers should budget the 250 mA average current limit and confirm that clamped energy keeps the junction below the 155 C maximum operating temperature during repetitive transient events.
Recommended
DC-DC Converter Output Rectification
In low-power switching converters, the BAT46WH can serve as the output (freewheeling or catch) rectifier for loads up to 250 mA average. The Schottky's absence of reverse recovery reduces switching losses on each converter cycle, improving efficiency compared with a fast-recovery P-N diode, and the 850 mV forward drop limits conduction loss at low duty-cycle outputs. The 2.5 A non-repetitive peak rating covers start-up and capacitor-charging inrush events. Note that Schottky leakage rises with temperature, which slightly degrades light-load efficiency on hot boards; the 100 V rating also allows use on 24 V and 48 V input topologies with adequate switching-node margin.
Recommended
Line Termination and Signal Protection
Nexperia lists line termination among the BAT46WH's intended applications. Schottky clamps placed to rail or to ground on data and transmission lines absorb reflected energy quickly, because the junction turns on without recovery delay and conducts at roughly 850 mV. The flat-lead SOD-123F package minimizes parasitic series inductance relative to formed-lead packages, preserving high-frequency clamping performance on the board. With a 100 V standoff the part also survives ESD-class and cable-discharge residual events that over-stress lower-voltage small-signal diodes, making it a robust choice for industrial field-wired I/O and consumer connector ports.
Recommended
Industrial and Consumer General-Purpose Rectification
For general low-current rectification on industrial control boards, appliances, and consumer electronics, the BAT46WH offers a compact, RoHS-compliant building block rated 100 V and 250 mA with operation to 155 C, covering most ambient environments without derating complexity. The flat-lead SOD-123F package improves solder-joint fatigue life on boards subject to thermal cycling - a documented reliability advantage over the formed-lead SOD-123. Its low forward drop reduces self-heating at rated current, and the 2.5 A surge rating tolerates capacitor inrush at power-up. Where a legacy SOD-123 footprint exists, the BAT46W provides an electrical match.
Recommended
Recommended Products Summary
Engineering reference data for BAT46WH — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BAT46WJ | BAT46W | BAT46W-E3/W |
|---|---|---|---|---|
| Package | SOD-123F (flat lead) | SOD-123F (flat lead) - same | SOD-123 (formed lead) | SOD-123 (formed lead) |
| Brand | Nexperia | Nexperia | Nexperia | Vishay |
| Reverse Voltage (VRRM) | 100 V | 100 V | 100 V | 100 V |
| Forward Current | 250 mA | 250 mA | 150-250 mA | [DATA_NEEDED] |
| Forward Voltage (VF) | 850 mV | 850 mV | [DATA_NEEDED] | [DATA_NEEDED] |
| Surge Rating (non-repetitive) | 2.5 A | 2.5 A | [DATA_NEEDED] | [DATA_NEEDED] |
| Max Operating Temperature | 155 C | 155 C | 150 C | [DATA_NEEDED] |
| Guard Ring / Stress Protection | Yes (integrated) | Yes (integrated) | Yes (integrated) | [DATA_NEEDED] |
| Lead Form / Footprint | Flat lead (SOD-123F) | Flat lead - pin-to-pin drop-in | Formed lead - footprint check required | Formed lead - footprint check required |
Key Differentiators
- 100 V reverse rating in a small SMD package (vs 1N5711WS-7-F)
- Flat-lead SOD-123F improves board reliability (vs BAT46W)
- Integrated guard ring for stress protection (vs Generic SOD-123 Schottky)
Design Notes
Schottky reverse leakage in the BAT46WH approximately doubles roughly every 10 C of junction temperature rise, so leakage on a hot board can be an order of magnitude above the 25 C figure. Estimate power dissipation as P = VF x IF = 0.85 V x 0.25 A = about 0.21 W (Estimated: using datasheet VF and IF maxima) plus leakage loss on the blocking phase. Keep the junction below the 155 C maximum, and for sealed enclosures validate leakage at worst-case ambient since it directly affects standby current in battery products.
The SOD-123F flat-lead package is designed to sit flush on the pad, improving solder-joint reliability - do not substitute a formed-lead SOD-123 footprint without checking pad geometry, since the flat lead changes fillet formation. Keep cathode band orientation confirmed in the pick-and-place file; reversed BAT46WH placement is a common rework cause. Typical land patterns from the Nexperia datasheet package outline should be used as-is for reliable reflow.
Do not exceed the 250 mA average forward current or 100 V repetitive reverse voltage even briefly in repetitive operation - the 2.5 A figure is a NON-REPETITIVE surge rating only. When substituting from other brands' BAT46-family parts, verify that the SOD-123 formed-lead variant actually meets the same VF and leakage limits, since these differ between manufacturers; always order the ,115 suffix code for the RoHS-compliant version.
Compliance Information
Ordering code BAT46WH,115 denotes RoHS-compliant, lead-free finish per Nexperia/DigiKey product listings. REACH and halogen-free status not stated in provided data.
